: weighing less than the normal or requisite amount
Examples of underweight in a Sentence
Adjective
the long illness left him frail and underweight
Recent Examples on the Web
Jim Cramer, CNBC, 14 Mar. 2025
Body Mass Index — or BMI — is a formula where a person's weight (in kilograms) is divided by the square of their height (in meters), and that number is used to sort people into four categories: underweight, healthy, overweight or obese.
—Vanessa Etienne, People.com, 28 Feb. 2025
He was taken to Mystic Aquarium to rehab after an exam showed the seal was underweight and dehydrated.
—David Matthews, New York Daily News, 4 Mar. 2025
Southwest Airlines — Shares slid 2% after JPMorgan downgraded the airline carrier to an underweight rating from neutral.
—Sarah Min, CNBC, 3 Mar. 2025
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Adjective
Wells Fargo lowered its price target on Ulta Beauty to $310 a share from $360 and kept its underweight sell rating on the stock after earnings.
—Jim Cramer, CNBC, 14 Mar. 2025
Body Mass Index — or BMI — is a formula where a person's weight (in kilograms) is divided by the square of their height (in meters), and that number is used to sort people into four categories: underweight, healthy, overweight or obese.
—Vanessa Etienne, People.com, 28 Feb. 2025
He was taken to Mystic Aquarium to rehab after an exam showed the seal was underweight and dehydrated.
—David Matthews, New York Daily News, 4 Mar. 2025
Southwest Airlines — Shares slid 2% after JPMorgan downgraded the airline carrier to an underweight rating from neutral.
—Sarah Min, CNBC, 3 Mar. 2025
See All Example Sentences for underweight
Cite this Entry
“Underweight.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/underweight. Accessed 25 Mar. 2025.
Copy CitationMedical Definition
underweight
adjective
un·der·weight
-ˈwāt 
: weighing less than the normal amount for one's age, height, and build
underweight children
underweight adults typically have a body mass index of less than 18.5
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